package com.lllll.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.lllll.reggie.common.R;
import com.lllll.reggie.entity.Employee;
import com.lllll.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;

    /**
     * 员工登录
     * @param request
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee) {
        // 将页面提交的密码进行md5加密处理
        String employeePassword = employee.getPassword();
        employeePassword = DigestUtils.md5DigestAsHex(employeePassword.getBytes());

        // 根据页面提交的用户名查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        // Employee::getUsername相当于创建一个Employee对象并调用其getUsername方法
        queryWrapper.eq(Employee::getUsername, employee.getUsername());
        Employee one = employeeService.getOne(queryWrapper);

        // 如果没有查询到则返回失败
        if(one == null) {
            return R.error("登录失败，无该用户");
        }

        // 密码比对
        if(!one.getPassword().equals(employeePassword)) {
            return R.error("密码错误");

        }

        // 查看员工状态，如果为金庸状态，返回已禁用
        if(one.getStatus() == 0) {
            return R.error("该用户已被禁用");
        }

        // 登录成功，将员工id存入session并返回登录成功结果
        request.getSession().setAttribute("employee", one.getId());
        return R.success(one);
    }

    /**
     * 员工退出
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request) {
        // 清理session中保存的当前登录员工的id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");

    }

    /**
     * 新增员工
     * @param employee
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request, @RequestBody Employee employee) {
    // 设置初始密码，需要进行md5加密处理
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
        //employee.setCreateTime(LocalDateTime.now());    // 很多表中都存在这些字段，属于公共字段，可以对其进行优化
       // employee.setUpdateTime(LocalDateTime.now());
        // 获得当前用户的id
        //Long empId = (Long) request.getSession().getAttribute("employee");
        //employee.setCreateUser(empId);
        //employee.setUpdateUser(empId);

        employeeService.save(employee);

        return R.success("新增员工成功");

    }

    /**
     * 员工信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
       // 构造分页构造器
        Page pageInfo = new Page(page, pageSize);

       // 构造条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper();

       // 添加过滤条件
        queryWrapper.like(StringUtils.isNotEmpty(name), Employee::getName, name);

       // 添加排序条件
        queryWrapper.orderByDesc(Employee::getUpdateTime);

        // 执行查询
        employeeService.page(pageInfo, queryWrapper);

        return R.success(pageInfo);
    }

    /**
     * 根据id修改员工信息
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request, @RequestBody Employee employee) {
        //Long empId = (Long) request.getSession().getAttribute("employee");
        //employee.setUpdateTime(LocalDateTime.now());
       // employee.setUpdateUser(empId);
        long id = Thread.currentThread().getId();
        log.info("线程id为{}", id);
        employeeService.updateById(employee);
        return R.success("员工信息修改成功");
    }

    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id) {
        Employee employee = employeeService.getById(id);
        if(employee != null) {
            return R.success(employee);
        }
        return R.error("没有查询到对应员工信息");

    }
}
